Mankind created a lot of machines. An airplane having mastered the laws of the air stopped being a miracle. Way before that ships tamed the oceans. But restless minds keep on creating new machines. And there you are a vessel that can take off from water not really leaving it. What is it? A sailing aircraft, or a flying vessel? What kind of a technical wonder is that, existing at the edge of two environments?
Bonus material: SM-1, SM-2, Be-1, VV?-14, Skat, K?lmar, ???r, Jayran, Zubr, KM, SM-5, SM-8, SM-6, ?rlyonok, Lun, Volga-2, Strizh, Ivolga, Aquaglide-5.